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G. G. TAYLOR. MANUFACTURING GUTTER BARS POR HARVBSTING MACHINES.

No. 45,879. Patented Jan. v10, 1865.

UNITED STATES PATENT OFFICE.

GEORGE (l. TAYLOR, OF WORCIISTER, MASSACHUSETTS, ASSIGNOR TO HIM? SELF, TI-IOS. Il. DODGE, 'AND ALZIRUS BROWN, OF SAME PLACE.

METHOD 0F MANUFACTURING CUTTER-BARS FOR HARVESTlNG-MACHlNES.

Specification forming part of Letters Patent Ifo. l15,879, dated January'lO, 1865. l

To al@ whom it may concern:

Be it known that I, GEORGE G. TAYLOR., ot' the city and county et' Worcester, and State of lllassachusetts, have invented certain new ot' said invention, reference being had to the accompanying drawings, in which- Figure 1 represents a perspective view of the bed-plate on which I punch my sickle-bar, the sickle-bar being placed thereon in the pol sition to be punched. Fig. 2 represents a perspective view of said bed-plate without vthe sickle-bar.`

lleretoi'ore the holes in the sickle-bars for the rivets or bolts by which the knives are secured to it have been drilled. This is a tedious and veryexpensive operation, but it-was found necessary to drill them, as by punching said holes the bar elongates in each direction, which renders it impossible to make thedistances be tween the holesot the exactlengths. This, as is well known, is very essential, as not only the proper operation of each section of the knives depends upon its accurate position in relation to the guard-fingers, but also in fitting and securing the several knife sections, which are all made at'ter the same pattern. Considerable delay and diiiiculties will occur unless the holes in the sickle-bar are made with great accuracy.

My invention, therefore, consists in the application ot' certain devices by which I am enabed to punch the sickle-bar so that all the hoh-s will come true and a-t their proper places.

To enable others skilled in the art to make and use my invention, I will proceed to describe its consiraction and operation.

A represents a section of a sicklebar ot' a harvesting-machine, the part near its point being represent-ed broken oft'. c represents the heel of the cutter-bar; and b'the head, to which the pitman of the machine is attached. B represents a combined pattern and suppoiting bar. 1t is inshape similar to thesickle-bar, and is provided with a hinge. joint, c. The two bars are til mly secured together by means of a screwbolt, d, which passes through the pattern-bar B, and which keep the cutter-bar from lateral motion. The ba-rB is provided4 with a number ot' ratchet-teeth, g, whose edges or projections correspond with the centers of the holes'to be punched in the cutter-bar.

The cutterand supporting bars, having been firmly secured to each other in the manner above described, are placed upon a bedplate, D, as represented in Figxl. This bed-plate is l made of heavy cast iron'or other suitable ma terial, and is shaped as represented in the drawin Ithas a groove, q, in which the cutter-bar rests, and a ledge or projecting flan ge, It, against which the outer side ot' th'e patternbar B hears to hold the latterV in its truc position. It is also provided with a punchfblock or anvil, E, located at the proper distance from the edge It, and on which the cutter-bar is punched, so that the holes ltherein will come true in a longitudinal as well as in a lateral direction. The punchvblock E is provided with a punch-die, m..

G represents uprights, which extend from the bedplate, and to one ot' which the stud I-I is secured, on which the pawl I is pivoted.

'hen the cutter-bar and its supporting or pattern bar B are set properly upon -the bedblock l), the rack-teeth g come under the pawl I, so that the latter will drop into the notches thereof. The cutterbar and its pattern-bar being iirmly bolted together at the heel and secured against lateral motion by the clamps C, it follows that the cutter-bar cannot elongate towardthe heel, but it cando so toward. its point.

The two bars, secured together as above de'- scribed, are placed upon the bed-block D in their proper positions, and are pressed by hand or otherwise against the pawl I. The opera ion of punching is now commenced by means ot' a punch of any proper construction at the hole l, the nearest to the heel, and as the cutter-bar A is firmly bolted to its pattern-bar, anyr elongation of the same can take place in the direction of the point only. The liole2 is punched next, then the holes 3 4 5, Sac., and consequently all the additional elongationcan take place in the direction of the point of the cutter-bar only and always beond the 11st hole punched; and when the suicient number of holes are punched the cutter-bar A is removed and its point cut oit atthe properlength,

The operator may move the bars by hand l and hold'them against the pawl I; or said movement may be effected automatically by means of a rack or other self-operating device.

From the above it will be seen that no elon;

and care which are necessary in marking oli' the holes preparatory to drilling, which is also saved by this apparat-us.

Having thus'fully described the nature of my invention, what I claim herein as new, and desire to secure by Letters Patent, is

1. Forming the holes for the rivets or bolts by which the cutters are fastened to the cutterbar, in reaping and mowing machines, by punching, in combination with holding the cu tter-bar during the operation, so that it cannot elongate in the direction of the heel of the bar, for the purposes herein set forth.

2. The use of the combined pattern and supporting-bar B, as shown and described, to aid in the operation of punching cutter-bars; substantially in the manner herein described.

3. In combination with the pattern or supporting bar B, the bolt d, and'stayclasps C for holding the cutter-bar, substantially as herein set forth.

Witnesses GEORGE G.. TAYLOR. Trios.v H. DODGE, J. HENRY HILL. 

